From 40e700ad042089120456cc2ee79b8ca69479416b Mon Sep 17 00:00:00 2001
From: Stefan Krah <skrah@bytereef.org>
Date: Sat, 15 Aug 2020 16:06:21 +0200
Subject: [PATCH] bpo-40878: xlc cannot handle C99 extern inline. (GH-21887)

This applies to the default "extc99" mode.  Python does not compile with "stdc99".
---
 Modules/_decimal/libmpdec/mpdecimal.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Modules/_decimal/libmpdec/mpdecimal.c b/Modules/_decimal/libmpdec/mpdecimal.c
index b3ec13a509b..f0e4d7f343a 100644
--- a/Modules/_decimal/libmpdec/mpdecimal.c
+++ b/Modules/_decimal/libmpdec/mpdecimal.c
@@ -64,7 +64,7 @@
 
 #if defined(_MSC_VER)
   #define ALWAYS_INLINE __forceinline
-#elif defined(LEGACY_COMPILER)
+#elif defined(__IBMC__) || defined(LEGACY_COMPILER)
   #define ALWAYS_INLINE
   #undef inline
   #define inline